[gdal-dev] enable GEOS support (GDAL/OGR 1.7.1; GEOS 2.3.0; VB.NET)

[toefftoeff1 at gmx.net]

Hi Tamas,

thanks a lot for Your reply.

Using Your SDK I was able to track down the compilation problem - swig
did not re-generate all files
and I needed to include an extra GEOS-header directory as follows:

GEOS_CFLAGS = -I$(GEOS_DIR)/capi -I$(GEOS_DIR)/source/headers
-I$(GEOS_DIR)/source/headers/geos -DHAVE_GEOS

-- 
Kind regards,

  Christoph

> Hi,
>
> You might wan't to make a test with the packages available at:
> http://vbkto.dyndns.org/sdk/
>
> All of those gave geos support compiled in.
>
> By downloading the SDK pacakges your could also compile gdal by
> yourself easily using a VS Command Prompt and type 'nmake gdal' in the
> SDK root directory.
>
> Best regards,
>
> Tamas
>
>
> 2010/3/5 <toefftoeff1 at gmx.net <mailto:toefftoeff1 at gmx.net>>
>
>     Hello,
>
>     I would like to build and use OGR with GEOS support on Windows XP
>     32 bit
>     using
>     Visual Basic.NET (.NET framework 2.0 or 3.5).
>
>     GDAL/OGR 1.7.1 and GEOS 2.3.0 compilation seem to work fine (using
>     nmake, Visual Studio 2008, only
>     warnings, no error messages).
>
>     I used the following GDAL/OGR nmake.opt settings to include GEOMS
>     support:
>
>     # Uncomment for GEOS support
>     GEOS_DIR=D:\svn\code\Tools\geos-3.2.0
>     GEOS_CFLAGS = -I$(GEOS_DIR)/capi -I$(GEOS_DIR)/source/headers
>     -DHAVE_GEOS
>     GEOS_LIB     = $(GEOS_DIR)/build/msvc90/Release/geos_c_i.lib
>
>     But using GEOMS in a sample .NET project always results in an
>     exception
>     "GEOS support not enabled".
>
>     Sample code:
>
>                Ogr.RegisterAll()
>
>                Dim g1 As Geometry = Geometry.CreateFromWkt("POLYGON((0 0,
>     10 10, 10 0, 0 0))")
>                Dim g2 As Geometry = Geometry.CreateFromWkt("POLYGON((-90
>     -90, -90 90, 190 -90, -90 -90))")
>
>                Dim result As Boolean = g2.Contains(g1)
>
>     I copied all GDAL/OGR wrapper libraries and geos_c.dll to the
>     appropriate places.
>
>     Any suggestions?
>
>     Thanks a lot...
>
>      Christoph
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>
>

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